Radio amplifying receiver



Patented fdipf. 6, 1.926.

STATES* isz/9,65

T T FFICE. i

PERY GAVIN, F NATIONAL SANITARIUI/I, TENNESSEE.

RADIO AMPL'IFYING- RECEIVER.

l Application filed October 17, 1925.' Serial No. 63,023.

.To all whom 25 may conce/m.' Be it known that I, PERCY GAvIN, a eitlzen of the United States, residing at Nation- 'al'Sanitarium, in. the county of Washington and State of Tennessee, have invented certain new and useful .Improvements 'in Radio Amplifying Receivers, of which the following is a specificationn The present invention relates to receivers primarily intended for use in radio oommunication; and the primary object of the invention is to provide a device of this character for producing, reproducing, or magnifying speech or any other tone with suiiicient amplitude and volume, 'and at the same time reducing to Va minimum all undesirable sounds and disturbances, by reason of the softness of which the tones are produced.

A further object of the invention is the provision of an improved receiver of the character speciiied, wherein the aforementioned results l,are obtained by the magnetic coupling of a pair of co-acting diaphragme serving as independent pole pieces of independentfpernianent magnets of the receiver, in the magnetic iield of the electro-magnets of the receiver'.

l on line 3-3 of Figure l.

pole pieces. of

Figure 4 is a fragmentary sectional view on line 444-4 of Figure 1; and,

Figure 5 is a diagrammatic .view'illustrating the manner .in which the are connected so as to serve as independent the independent permanent magnets;

Referring to the drawing in detail, where' in' -for the purpose. of illustration is shown but one embodiment of the principle in? volved, and wherein similar reference characu ters designate corresponding parts throughout the several views; the letter A designates generally a -receiverof the watchcase diaphragme o of head sets.

type, en'ibodying a casing B, diaphragmatic means C and actuating means D therefor supported within the casing B.

Referring particularly now to the casing B, the saine consists of inner and outer nested cups-l() and il respectively.' which are preferably but not. essentially formed of magnetic metal, and which .cu ps arev insulatively separated one within the other as by a thin'cup l2 formed of any suitable insulating material. These cups l0 and l are of theusual configuration as that of the present Watchc'ase type of receivers, having cylindrieal side walls and fiat bottom portions.

As willbe observed upon viewing Figures 2, 3 or 4, the cup .members 11, 12 and 10 decrease in height in the respective order given, thus disposing the upper edge of the spacing insulating cup l2 below the upper edge of the out'ei cup ll and above the upper edge of the inner cup l0. The object in so disposing the cups ,with their upper edges in stepped' relation will be subsequently set forth. A cap or cover 13 formed of hard rubber or a suitable composition, and provided with a centralaperture for egress of the sound waves, has carried vinwardly of the flange 14 thereof an internally threaded metal ring l5 of substantially i.-shaped in cross section;L for threaded connection with external screw threads provided adjacent the upper edge of the outer cup l1.

its inwardly extending leg pending annular pressure ring of a like diameter and thickness as that of the inner cup 10. when the'c'over 13 is portion, a deturned upon the cup l1,

the under face of the pressure ring 1,6 will 'be disposed in direct confrontingrh ion with the upper edge of the' inner .ci1 '10.

This metal ring l5 has formed on y 16 y preferably "Q0 Thus it will be seen that i' The 4outer cup ll may be provided withV diametrically tachable reception of one end of a head band as now in common use withcertain types A thin disc of insulating material i8 is fitted in the c up 'l0' for insulatively spacing' thel actuating means Y l) from contact with any metal portionfo'f the casing B.

Referring' now means C, the saine shapeddiaphragme held in 'adjustable embodies a pairy of disc .another as by incompressible insulating ring arranged apertures 17 for de- I to the diapliragniatie- 2 0 and l21 i-nsula'tively spaced relation :to lone l through the insulating dise 1b und has iorrnntieu, und wh.

22 Of :i dizmieier te Smieiy iii; within 'the oui-er clip section il. ihese diephrnr'iiis Q0 and Q1, und which muy he rezpr-ei'veiy termed inner and oiii'er diphrrxgjme) muy he formed oi' Soit iron or #Levi o? ihe dwired thiehnese, :md as wiii he ohservesi in ifi: 52, the inner dinphrugiii 2U if oi diameter hziii the diziine'er of the i 2i. it Wiii here he noted fiii il ing emp 1Q extends peet the upper edbi'e i'- Of the iii-11er metal up l() for :i disizmee eq to ihe ti'xiekiiese oi' ihe inner diiiphrzi 20, zuid that the inner diziidirngfiii 24) oni' :1, diameter to snugly lit; within 'he insulating cup 'i2 and .rests :it iis oui-er edggein con ducting rehi'rioil upon 'the upper edgjge hire of the iiezd eiip i0; rfhiie the oiiier di:iphriign'i 2i .is of ai dizuiieier "ro snugly iii within die eurer rneiui culi ii Thus it will be Seen thai the Vdhiphrzigrni {if} is heid iii Conducting relation ivih ihe iiilier oep 1U? While the diaphrngi'h 2i whieh i# iiimihitire 1y spaced from the diiiphr o1 :2U :md inner cup l0, .is eoiidur-,tiveiy eomieeief wi'ih ihe outer cup l1 :is hy die iiiehii ri it will readily be appiiri it hei upon rotziioii of the @over i3 iii one direction or ihe other will ziet upon the yiehluihle riii iii :i um@ 11er for varying the speeing heme-eo he diuphragms 2O and 21. g

`W1th reference new to the :ietiediiig means YD, J@he esame eirdilodiee independent, preiiierz'hiy humiliated sieri A r eur mwiiets 25)' and 2L of Seiiii-ifireidrir Shape .iii

' h are arranged in trie rviihiri lih@ iiiiiler euh l oi B, and with .Their iiiie poles, :di

Si mi' Jim iihe easing;

:from one another is eieiirij.' e "ied in Figure l. For ti e por we Mirthe ex phumtioii, the poles of i Le periimiieni mug; nets 23 and 2li here been indium-d :is pins (-Hi and minus (n) upon he (herring, Extending through the hiiiiiiire uf; ihr uhm-5 pole of 'the periiizmeni. iirwiiei li. i5 fi. or eountersrmk head hohi head sented .in :i tapering aperture QU in ii bottom wail of the inner emp i0. This ho 25, which is provided wiih the oek mds; 2T, serves as means 'for retaining 'the minus poie end of magnet 2i in position, :uid :deo :if: u (numeri-ing conductor between the minus pole of the iiiiignet and the imier metal cup 10. This eeiiiistruetion eieariy illustrated in Figure Extending through the laminfe ai the pine poie 'ei' the periimneiit magnet; 23, is :i iint or eounipersuiii: head bolt 2S which extends dirougii au insulated aperture 29 iu 'she inner emp lo.; and hes its head seated :in e. tnperiiif eperiure Si) in the bottoni Waii'of the outer @up il 'for serving; as iii-:rims for retaining the plus pole end of the nine" at, in `151011 eind :idee sewing as; ii connecting fondue... beteren. rile plus poi@ of the me et eed iii-f3 einer metri @up l.

1C in vSpeetireiy 4.For varying the 11m This hoh, 9S is pro 7idee. with loci; miie Si, und which arrangement of the boit clearly iii'itriited iu Figure L ieeured one i0 the minus poie o 2li* :uid one io the phif poie oi iforiiieii' soit iro-i in? ri eziifh eiiibedying has@ w grieiie iieid of their ifesiieaiiive pole pie# in ine Usui ner, ixtei'idiiig through the ha le i i oi the Lehaped hreekes :uid iiieiihieei ihere from, und through and iiisiihied from ehe hase o L ii :ire ieriiiir'zii binding posi, iT zuid 3S fihi i are eieerrieeiij; coi nerim zit iheir iriier to it wiiidirffs 3' and Si?, reepseLirely.` 25e hiiiding pes :ind 3S also serre @.5 oie-rms Ier Seeuriiio i iiiiiiue und pios pole ends of die iLieriiiiineigi iimgnets 23 :md 'ib-peeiieiy iii position. in ihe here oi rhee i?? und :52h50 :1er n.5 nieuwe Yi'or retaining the @up sections ld, :md if iii iiersied rehxl'ioiif T v Where "ehe :rrieiver is :i 1min i loud e 'form he bi1-ee e' io he einn eoiii'eetor ring lf3 maybe ehi.. the merid brise oi the horn im ier eompiehiiig; the Circuit heme Cup il sind the euier diaphragm EL Referring piiiti-euhiriy to Figure 5 of drawing, it will be ri i die ph' gm, :3.1 hezzoiaiee iii reziiiin e oi the iiiiigiiein .'vherc diaphragm 2O heroine., pele or he magiiei 24.". 'thus nml. D phragrns 2O und 21 unlike poles., e will he seen ihm, eaee @if *die diaphragme 2O and 2l becomes independei pcie pieces i the mugneis 223 and 24, o'iz'igiietieziiiy coupled iii the iehi of the poles 311i und 34; and possessing lehe diaphragme with a greater amplitude of resonant vibration when ei- 'eeied by *die field of the poles and attraction when uniiiie ehnrgeifi, and rejoeihug when iihe eherged. This action eeeeunts @for the eieariiess 0i which 'the sound is pre- Cil n'mgnetically'connectedto the opposite poles described, without vdeparting from the spirit of the invention or the scope of the claims.

I claim: l. En an amplifying receiver for telephony, diaphragmatic means,: and magnetic means for inuencing said diaphragmatic means, and vincluding electroma nets magnetically connected to the diep agms of the latter, so that said diaphragme act as poles of the magnetic means.

. In an amplifying receiver for telephony, diapliraginatic means, and magnetic4 means for influencing said diaphragmatic means, and including electromagnets having pole pieces of unlike polarity magnetically connected to the diaphragms of the latter',

-so that said diaphragme act as poles of the magnetic means.

3. in an ampllfying receiver for telephony, diaphragmatic means, and magnetic means for lnuencing said diaplfiragmatic`y means, and including electromagnets so magnetically connected to the diaphragme of the latter, so that said diaphragme act as unlike poles of the magnetic means.

d. in an amplifying receiver for telephony, diaphraginatic means, and magnetic means for iniiuencing said diaphragmatic means, and including electromagnets-having pole pieces of unlike polarity so magnetical- 'ly connected-to the'diaphragms of the diaphragmatic means, that said diaphragme act' vas unlike poles of the 'magnetic means.

insu amplifying receiver fortel'ephony, diaphragmatic means including 1nsulativeiy spaced apart parallel duiaphragmi and magnetic means for iniiusncing- 'sai diaphragmatic means, and including elecf tromagnets having uniike pole pieces so y-ujiagnetically connected 'to the dlaphragms,

that said diaphragme are madethe opposite poles from the respective pole" pieces to which they are magnetically connected.

6. An ampliying-receiyer for telephony f comprising a casing,"independent permanent magnets arranged 1n said'casingg electro-v magnets arrangedinsaid casing and each haring its pole piece magnetically connected to one pole of said permanent magnets, and diaphragmatic means, ,including diaphragme ci 'the permanent magnets and arranged in the magnetic field; of the poles. of the4 electromagnets."

7. An ainpiifying receiver for telephony remprising a casing, independent'permanent nmgnets 'arranged insaid casing, electromagnets arranged in said casing and each having its pole piece magnetically connected to unlike poles ci the permanent magnets, and mident diaphragms magnetically .connecter ene to each oi the opposite poles ci' the permanent magnets and disposed in the magnetic ieldof the poles of the electro'- magnets. v

A8. An amplifying receiver for telephony comprising a casing embodying nested metallic cups insulated one from the other, permanent magnets arranged within the inner cup and each having one pole thereof 4connected respectively to the inner and outer cups of the casing by metallic connecting elements, electromagnets in the casing and having their pole pieces connected to the opposite poles' of the lpermanent magnets, and diaphragmatic means including spaced diaphragme arranged in the magnetic field of the pole pieces of the electromagnets, and with said diaphragme connected respectively to the innerand outermetallic cups of said casing'.vv

9. An amplifying receiver'l'for telephony comprising a casing embodying nestor cups formed of magnetic metal and insulated one from the other, a pairoiA permanent magnets of semi-circular formation arranged in thel inner cup with their like poles -in close l related relation, eiectromagnets having their pole pieces connected to iinlike poles of the permanent magnets, inea for magnetically connecting the Vopposite ualike poles of the permanent magnets @one 'to Vthe inner cup and one to the outer cup, and spaced diaphragms contacting one with each of said cups and disposed in the magnetic field of the pole pieces of said electiomagnets.

Nif

10. An amplifying receiver for telephony I comprisin a casing embodying nested cups formed o .magnetic metal and av spacing cup insulativel supporting one cup within the other, a d-yiaphragm in contact at its edge with the edge 4of the inner cup, a second diaphragm inl Contact at its edge with the edge of the outer cup and spaced rom the first diaphragm, means for retaining the diaphragme in'adjusted position, and magnetic means Within said casing 'for actuation of said diaphragme, and magnet` ically connected to the diaphragm through said cups.

11. An amplifying receiver' for telephony llos comprising a casing embodying nested cups A PERGY GAVN, 

